Coal-pick.



No. 704,039. Patented July 8, 1902.

F. HORN.

GOAL PlfiK.

(Application filed Sept. 17. 1909.)

(No Model.)

UNITED STATES FERDINAND HORN, OF OOSHOOTON, OHIO.

COAL- PICK.

SPECIFIGATION forming part of Letters Patent No. 704,039, dated July 8, 1902.

Application filed September 17, 1900. Serial No. 30,326- (N0 modem T0 to whom it NLCLZ/ concern:

Be it known that I, FERDINAND HORN, a citizen of the United States, residing at Coshocton, in the county of Ooshocton and State of Ohio, have invented a new and useful Coal- Pick, of which the following is a'specification.

This invention relates to coal or mining picks; and the object of the same is to provide simple and effective means of a strong and durable nature for removably securing the pick-blade to the socket within the eye of the latter, whereby one handle or helve may be used with a plurality of different pickblades and also wherein the socket is secured to the handle or helve end by a single fastening, and thereby avoid impairment of the strength of either device.

The invention consists in the construction and arrangement of the several parts, which will be more fully'hereinafter described and claimed.

In the drawings, Figure 1 is an elevation of a pick with a portion of the handle broken off and embodying the features of the invention. Fig. 2 is a sectional elevation of the same. Figs. 3, 4, and 5 are detail perspective views of the pick-blade, key for fastening the same, and socket, respectively.

Similar numerals of reference are employed to indicate corresponding parts in the several views.

The numeral 1 designates a handle or helve of any ordinary form having a central angular projection 2 at its center to fit into a corresponding seat 3, formed in a socket 4 by slightly boxing the opposite sides, as at 5, the socket having opposite converging flanges 6, secured at their reduced portions to the handle or helve by a single fastening 7, passing transversely therethrough and through the said handle. On the outer end of the socket is an extension 8, which is of less Width than the latter and is formed with an eye9, havin g an inner straight wall 10, with right-angular shoulders 11 at the opposite ends of the same, and thereby providing a projection hav ing a substantially rectangular contour. The eye is of greater extent from the inner to the outer wall thereof than the cross-sectional dimension of the intermediate portion of the pick-blade 12, which engages the same, and

the inner edge of said blade at the center is formed with an approximately rectangular seat 13 to receive the said rectangular pro jection on the inner wall of the eye. The distance between the outer edge of the pickblade and the outer wall of the eye is taken up by a removable key 14, havinga right-angular head end 15 and an opposite split-spring terminal 16, having normally-flared compressible members 16, with their flares beginning from the opposite parallel side edges of the key a distance from the angular projecting portion of the head 15 equal to the width of the outer portion of the eye, so that when the key is driven to its full extent through the outer portion of the eye the flared members will lock it against accidental disengagement.

In assembling the parts of the improved pick the pick-blade is pushed through the eye until the rectangular seat therein coincides .with the similar projection on the inner wall of the said eye and the flaring terminals 'or members of the key are compressed and the key driven through the eye to firmly hold the seat or recess in the pick-blade and the projection on the inner wall of the eye in inseparable relation. It will be observed that there are no set-screws to work loose by the movement and vibration of the pick-blade, and there are no projections to interfere with the blow of the pick-blade, particularly in working the same 'closelyin a rift or fissure or other small space or-against a wall of coal or other material. The blow of the pick will be delivered against the opposite square shoulders of the projection of the inner wall of the eye, and thereby the blade will be prevented from slipping, and the socket is in like 1nanner firmly held on the outer end of the handle or helve. Inremoving the pick-blade the flaring members of the key are compressed and said key then forced outwardly from the eye to allow the seat or recess in the blade to be disengaged from the projection on the inner wall of the eye.

The preferred form of theimproved-device has been shown and described; but it is ob- ICO Having thus described the invention, what vided with a stop and the other end with latis claimed as new is- A coal-pick comprising a helve-socket provided with an eye having its lower wall reduced in width to present a shoulder, a pick having a recess to engage the shoulder, and a solid key firmly bearing against the pick and the walls of the eye and constituting a non-yielding surface which will operate to prevent vibration of the pick, in the eye, under impact, one end of the key being pro- 'erally-proj ectingmembers disposed exteriorly of the eye and operating positively to hold the Witnesses:

J. P. BONNETT, EMMET FRY. 

